Energized range burner signal

Abstract

When a top burner of the electric range is energized, a sensible signal means is simultaneously activated. This sensible signal means is deactivated by the act of placing a cooking utensil upon said energized top burner. Circuit means are provided for electrically coupling energy from the energized top burner of the electric range. Such circuit means will include electric switching devices which are operative to deactivate the sensible signal when a cooking utensil is placed upon the energized top burner.

Claims

1. In combination:

an electrical resistive heating element;

a selector switch for connecting a source of electrical power across said element;

a voltage divider network having two resistors and an alarm switch connected in series, said network being connected in parallel with the heating element;

means for opening the alarm switch when a utensil is placed on the heating element and for closing the switch when no utensil is present on the heating element; and

alarm signal means for producing an alarm signal connected across one of the resistors of the network, said alarm signal circuit means producing an alarm signal only when a source of electrical power is connected across the heating element and no utensil is placed on the heating element.

2. The combination of claim 1 in which the source of electrical power produces an alternating electric current.

3. The combination of claim 2 in which the alarm signal means includes a transformer having a primary winding and a secondary winding, said primary winding being connected across a resistor of the network and means for producing an alarm signal being connected across the secondary winding of the transformer.

4. The combination of claim 3 in which the alarm signal is audible.

5. In an electrical range having a plurality of electrical resistive heating elements and selector switch means for connecting a source of electric power across each element, and an alarm apparatus comprising:

one of said plurality of alarm circuits, each alarm circuit including an alarm switch, one alarm circuit being associated with each heating element, and each alarm circuit being connected in parallel with its associated heating elements;

means for opening the alarm switch of an alarm circuit when a cooking utensil is placed on the heating element with which each alarm circuit is associated; and

an alarm signal circuit means operatively connected to each alarm circuit for producing an audible alarm signal, said alarm signal circuit means producing audible alarm signals when a source of electrical power is connected across one of said heating elements and no cooking utensil is positioned on that heating element.

6. The alarm apparatus of claim 5 in which the source of electrical power produces an alternating electrical current.

7. The alarm apparatus of claim 6 in which each of the alarm circuits is a voltage divider network having at least two resistors.

8. The alarm apparatus of claim 7 in which the means for opening an alarm switch are mechanical means including a lever.

9. The alarm apparatus of claim 8 in which the alarm signal circuit means includes a transformer having a primary winding and a secondary winding, said primary winding being connected across a resistor of each of the voltage divider networks, and an alarm device for producing an audible alarm signal being connected across the secondary winding.

10. In combination:

an electrical resistive heating element;

a selector switch for connecting a source of electrical power across said element; and

alarm circuit means for sensing when electrical power is connected across said element for sensing when a utensil is positioned on said element, and for producing an alarm signal only when power is connected across said element and no utensil is positioned on said element.